Providers Kelly O'Sullivan, OT to Kathleen O'Toole, M.D.
300 individual NPIs in the federal registry, part 16,056 of 24,427 of the A to Z by surname. Each row is the registry's record: the name and credential, the NPI, the primary specialty, the practice city and the year the NPI was issued. 104 link to a page of their own with Medicare and CMS data the registry does not carry.
| Provider | NPI | Specialty | Practice city | NPI issued |
|---|---|---|---|---|
| Kelly O'Sullivan, OT | 1144615519 | Occupational Therapist | Olympia, WA | 2015 |
| Kelly O'Sullivan, LPC | 1386414332 | Mental Health Counselor | Fair Lawn, NJ | 2024 |
| Kelly O'Sullivan | 1467147645 | Student in an Organized Health Care Education/Training Program | Atlanta, GA | 2023 |
| Kelly O'Sullivan, PA-C | 1467488072 | Medical Physician Assistant | Lancaster, NY | 2006 |
| Kelly O'Sullivan, M.D. | 1750332474 | Geriatric Medicine (Family Medicine) Physician | Vancouver, WA | 2006 |
| Kelly O'Sullivan | 1881007201 | Student in an Organized Health Care Education/Training Program | Hawthorne, NY | 2014 |
| Kelsea O'Sullivan, MD | 1184243842 | Anesthesiology Physician | Mobile, AL | 2020 |
| Kelsey O'Sullivan, QMHA | 1861364374 | Addiction (Substance Use Disorder) Counselor | Portland, OR | 2025 |
| Kenna O'Sullivan, CRNA | 1891220281 | Certified Registered Nurse Anesthetist | North Kansas City, MO | 2017 |
| Kerry O'Sullivan | 1043776495 | Nurse Practitioner | San Diego, CA | 2019 |
| Kerry O'Sullivan, COTA | 1487074688 | Occupational Therapy Assistant | Appleton, WI | 2014 |
| Kerry O'Sullivan | 1801474630 | Emergency Medicine Physician | New York, NY | 2021 |
| Kevin O'Sullivan | 1588234926 | Hospitalist Physician | Boston, MA | 2021 |
| Kevin O'Sullivan, PT | 1669939476 | Physical Therapist | San Diego, CA | 2019 |
| Kevin O'Sullivan, M.D. | 1922492859 | Family Medicine Physician | Texarkana, AR | 2015 |
| Kevin O'Sullivan, ATC/L, CSCS | 1952389959 | Athletic Trainer | Elk Grove Village, IL | 2006 |
| Kieran O'Sullivan | 1407537301 | Behavior Technician | Colorado Springs, CO | 2023 |
| Kimberley O'Sullivan, M.D. | 1760461917 | Plastic Surgery Physician | Wellesley, MA | 2006 |
| Kimberly O'Sullivan, PHYSICAL THERAPIST | 1427513506 | Physical Therapist | Greenfield, MA | 2019 |
| Kimberly O'Sullivan | 1548350523 | Occupational Therapist | Orland Park, IL | 2006 |
| Kristin O'Sullivan, M.D. | 1245558980 | Pediatrics Physician | Mountain View, CA | 2010 |
| Laura O'Sullivan, PH. D., BCBA-D | 1942534631 | Behavior Analyst | Fort Myers, FL | 2009 |
| Lauren O'Sullivan, MS, CGC | 1083300438 | Genetic Counselor (M.S.) | Seattle, WA | 2023 |
| Lauren O'Sullivan, D.O. | 1316983679 | Gynecology Physician | Bend, OR | 2006 |
| Lauren O'Sullivan, MA | 1396978318 | Mental Health Counselor | Brookline, MA | 2009 |
| Lauren O'Sullivan, LICSW | 1508291345 | Social Worker | West Springfield, MA | 2013 |
| Layla O'Sullivan | 1245036649 | Behavior Technician | Murfreesboro, TN | 2025 |
| Lekha O'Sullivan, MD | 1649807637 | Pediatrics Physician | Cincinnati, OH | 2020 |
| Lera O'Sullivan, MD | 1245082866 | Emergency Medicine Physician | Madison, WI | 2024 |
| Liam O'Sullivan, M.D. | 1639431133 | Emergency Medicine Physician | Wenatchee, WA | 2012 |
| Linda O'Sullivan, MS LPC | 1700989019 | Mental Health Counselor | Asheville, NC | 2006 |
| Lindsay O'Sullivan, NP | 1083087225 | Family Nurse Practitioner | Wrentham, MA | 2015 |
| Lindsay O'Sullivan, FNP-C | 1669217733 | Nurse Practitioner | Wayne, MI | 2024 |
| Lisa O'Sullivan | 1225861271 | Registered Dietitian | Royal Oak, MI | 2024 |
| Louise O'Sullivan, L.AC., R.N., L.M.P. | 1285968396 | Acupuncturist | Seattle, WA | 2009 |
| Lucy O'Sullivan | 1992459010 | Student in an Organized Health Care Education/Training Program | Baltimore, MD | 2022 |
| Madeline O'Sullivan, MD | 1770111353 | Rheumatology Physician | Tulsa, OK | 2020 |
| Maeve O'Sullivan | 1962363556 | Adult Health Nurse Practitioner | New York, NY | 2025 |
| Mairead O'Sullivan, DPT, PT | 1285478925 | Physical Therapist | Boston, MA | 2024 |
| Mara O'Sullivan | 1740784396 | Emergency Medicine Physician | Wright Patterson Afb, OH | 2018 |
| Margaret O'Sullivan, DMD | 1689913204 | Dentist | Houston, TX | 2013 |
| Maria O'Sullivan, R.N | 1265862007 | Registered Nurse | Olathe, KS | 2013 |
| Martin O'Sullivan, RRT | 1528714607 | Registered Respiratory Therapist | High Springs, FL | 2022 |
| Martin O'Sullivan, MD | 1710093430 | Specialist | Philadelphia, PA | 2006 |
| Mary O'Sullivan, MS, OTR/L | 1306037130 | Occupational Therapist | Buffalo, NY | 2007 |
| Mary O'Sullivan, MA CCCA | 1407028079 | Audiologist | Yonkers, NY | 2008 |
| Mary O'Sullivan, LCSW | 1417660168 | Clinical Social Worker | St Charles, IL | 2022 |
| Mary O'Sullivan, AUDIOLOGIST | 1598915571 | Audiologist | Vancouver, WA | 2008 |
| Mary O'Sullivan, DNP, ARNP | 1699389494 | Acute Care Nurse Practitioner | New York, NY | 2020 |
| Mary O'Sullivan | 1710513197 | Counselor | Jamaica Plain, MA | 2020 |
| Mary O'Sullivan, ED.D. | 1952469884 | Clinical Psychologist | North Chelmsford, MA | 2006 |
| Mary O'Sullivan, M.D. | 1962495788 | Pulmonary Disease Physician | New York, NY | 2005 |
| Matthew O'Sullivan, ATC | 1295115434 | Athletic Trainer | Boston, MA | 2015 |
| Matthew O'Sullivan, MD, PHD | 1831625508 | Ophthalmology Physician | Colorado Springs, CO | 2017 |
| Maureen O'Sullivan, ADT | 1619435682 | Advanced Practice Dental Therapist | Roseville, MN | 2019 |
| Maureen O'Sullivan, LPC, LSW | 1871636548 | Social Worker | Richmond Hts, OH | 2007 |
| Megan O'Sullivan, MS, OTR/L | 1053863134 | Occupational Therapist | Drexel Hill, PA | 2016 |
| Megan O'Sullivan, MA, CCC-SLP | 1598011827 | Speech-Language Pathologist | Maywood, IL | 2012 |
| Megan O'Sullivan, PT | 1982709176 | Physical Therapist | New York, NY | 2006 |
| Meghan O'Sullivan | 1043719883 | Counselor | Buffalo, NY | 2018 |
| Meghan O'Sullivan, APN, FNP-BC | 1467244509 | Family Nurse Practitioner | Toms River, NJ | 2025 |
| Melissa O'Sullivan, N P | 1083752034 | Adult Health Nurse Practitioner | Rochester, NY | 2007 |
| Melissa O'Sullivan, MSN,FNP,APRN,BC | 1710990205 | Family Nurse Practitioner | Greensboro, NC | 2006 |
| Merita O'Sullivan, C.N.M. | 1972536092 | Advanced Practice Midwife | Houston, TX | 2006 |
| Michael O'Sullivan, MD | 1124747860 | Pediatric Orthopaedic Surgery Physician | Dallas, TX | 2022 |
| Michael O'Sullivan, RN | 1235257122 | Registered Nurse | Springfield, VT | 2007 |
| Michael O'Sullivan, MD | 1376981266 | Orthopaedic Surgery Physician | Springfield, MA | 2013 |
| Michael O'Sullivan | 1588146336 | Registered Nurse | Roseburg, OR | 2018 |
| Michael O'Sullivan, MD | 1811518848 | Family Medicine Physician | Mobile, AL | 2020 |
| Michael O'Sullivan, MD | 1962547901 | Psychiatry Physician | Minneapolis, MN | 2007 |
| Michelle O'Sullivan | 1285942383 | Speech-Language Pathologist | New York, NY | 2010 |
| Michelle O'Sullivan | 1316791643 | Mental Health Counselor | Belle Harbor, NY | 2024 |
| Molly O'Sullivan, SLP | 1104215466 | Speech-Language Pathologist | West Chester, PA | 2015 |
| Monica O'Sullivan, MD | 1043262546 | Internal Medicine Physician | West Allis, WI | 2006 |
| Nadine O'Sullivan | 1104070382 | Speech-Language Pathologist | Hicksville, NY | 2008 |
| Nancy O'Sullivan, L.C.S.W. | 1669690285 | Clinical Social Worker | Floral Park, NY | 2007 |
| Naomi O'Sullivan, MD | 1184177909 | Student in an Organized Health Care Education/Training Program | Long Branch, NJ | 2016 |
| Nora O'Sullivan, DNP, APRN, FNP-C | 1265210132 | Nurse Practitioner | Monroe, CT | 2023 |
| Nuala O'Sullivan, ARNP | 1366976144 | Acute Care Nurse Practitioner | Jacksonville, FL | 2017 |
| Paige O'Sullivan | 1801585096 | Behavior Technician | Charlotte, NC | 2023 |
| Pamela O'Sullivan | 1992188551 | Behavior Analyst | Bellmore, NY | 2015 |
| Patrice O'Sullivan | 1225515695 | Nurse Practitioner | Hyannis, MA | 2018 |
| Patricia O'Sullivan, M.ED. | 1578843587 | Developmental Therapist | Naperville, IL | 2011 |
| Patricia O'Sullivan, M.S. | 1588090104 | Specialist | Forest Hills, NY | 2013 |
| Patricia O'Sullivan, M.S. ED. | 1700339272 | Specialist | Peekskill, NY | 2016 |
| Patricia O'Sullivan, M.D. | 1760460844 | Geriatric Medicine (Internal Medicine) Physician | Boston, MA | 2006 |
| Patricia O'Sullivan, M.D. | 1891718508 | Obstetrics Physician | Oakdale, NY | 2006 |
| Patrick O'Sullivan, MD | 1265642482 | Ophthalmology Physician | Metairie, LA | 2007 |
| Patrick O'Sullivan | 1407645153 | Student in an Organized Health Care Education/Training Program | Pomona, CA | 2025 |
| Patrick O'Sullivan | 1427569615 | Counselor | Albany, NY | 2017 |
| Patrick O'Sullivan, ATC | 1962079327 | Athletic Trainer | Smithfield, RI | 2021 |
| Paul O'Sullivan, M.D. | 1497773857 | Diagnostic Radiology Physician | Houston, TX | 2006 |
| Philip O'Sullivan, M.D. | 1760420046 | Diagnostic Radiology Physician | Weymouth, MA | 2006 |
| Rachel O'Sullivan, RN | 1134910524 | Emergency Registered Nurse | Brooklyn, NY | 2025 |
| Rachel O'Sullivan, LCSW | 1659030393 | Clinical Social Worker | Waukesha, WI | 2021 |
| Rachel O'Sullivan | 1952752610 | Speech-Language Pathologist | Silver Spring, MD | 2016 |
| Reagan O'Sullivan | 1447187596 | Physical Therapist | Saratoga Springs, NY | 2026 |
| Rebecca O'Sullivan, BCBA | 1730833419 | Behavior Analyst | Passaic, NJ | 2022 |
| Renee O'Sullivan, NNP | 1033135744 | Neonatal Nurse Practitioner | Phoenix, AZ | 2006 |
| Richard O'Sullivan, M.D. | 1295987287 | Psychiatry Physician | Hartford, CT | 2008 |
| Richard O'Sullivan, CP | 1487842944 | Prosthetist | Redding, CA | 2007 |
| Robert O'Sullivan, DDS | 1295464220 | General Practice Dentistry | Nome, AK | 2022 |
| Robert O'Sullivan, DO | 1417921602 | Cardiovascular Disease Physician | Lansdale, PA | 2006 |
| Robert O'Sullivan, PA-C | 1841358058 | Medical Physician Assistant | Goldsboro, NC | 2006 |
| Robyn O'Sullivan, PH.D. | 1679881668 | Psychologist | Sunnyside, NY | 2010 |
| Roger O'Sullivan, D.C. | 1306923925 | Chiropractor | Columbus, OH | 2006 |
| Rosemary O'Sullivan, LMHC | 1881225894 | Professional Counselor | Spencer, MA | 2020 |
| Ryan O'Sullivan, D.D.S. | 1073966917 | Orthodontics and Dentofacial Orthopedics Dentistry | Oklahoma City, OK | 2016 |
| Ryan O'Sullivan, CRNA | 1104679398 | Certified Registered Nurse Anesthetist | Meadville, PA | 2024 |
| Ryan O'Sullivan, MD | 1487273603 | Student in an Organized Health Care Education/Training Program | Cleveland, OH | 2020 |
| Samantha O'Sullivan, LICSW | 1124573159 | Clinical Social Worker | Foxboro, MA | 2016 |
| Samantha O'Sullivan | 1962260240 | Registered Nurse | Columbus, OH | 2024 |
| Sean O'Sullivan | 1063308534 | Day Training/Habilitation Specialist | Oxnard, CA | 2025 |
| Sean O'Sullivan, DO | 1285073205 | Family Medicine Physician | Scarborough, ME | 2013 |
| Sean O'Sullivan | 1528735396 | Behavior Technician | Pacific Grove, CA | 2021 |
| Sean O'Sullivan, MD, PHD | 1609514702 | Psychiatry Physician | Austin, TX | 2022 |
| Sean O'Sullivan, LCPC | 1689158362 | Mental Health Counselor | Chicago, IL | 2018 |
| Sean O'Sullivan | 1710280607 | Dentist | Owings Mills, MD | 2010 |
| Senushi O'Sullivan, M.D. | 1922458702 | Hospitalist Physician | Fayetteville, AR | 2016 |
| Shannon O'Sullivan, LPC | 1053783035 | Professional Counselor | Drexel Hill, PA | 2015 |
| Shannon O'Sullivan | 1154058501 | Social Worker | Montrose, NY | 2022 |
| Shannon O'Sullivan, LPC | 1659743581 | Professional Counselor | Erie, PA | 2015 |
| Shauna O'Sullivan, D.O | 1033181490 | Rheumatology Physician | Bethesda, MD | 2006 |
| Sheila O'Sullivan, M.S. CCC-SLP | 1043464514 | Speech-Language Pathologist | Spring Valley, NY | 2008 |
| Shelby O'Sullivan | 1528586971 | Student in an Organized Health Care Education/Training Program | Hingham, MA | 2017 |
| Shelby O'Sullivan, PTA | 1821537135 | Physical Therapy Assistant | Louisville, KY | 2017 |
| Shelley O'Sullivan, RAS | 1952522898 | Addiction (Substance Use Disorder) Counselor | Hayward, CA | 2007 |
| Sierra O'Sullivan | 1487591186 | Student in an Organized Health Care Education/Training Program | Pontiac, MI | 2026 |
| Sina O'Sullivan, MD | 1003309352 | Cardiovascular Disease Physician | Jacksonville, FL | 2018 |
| Sonja O'Sullivan, CRNA | 1518324037 | Certified Registered Nurse Anesthetist | Knoxville, TN | 2016 |
| Stacy O'Sullivan, M.D. | 1457348344 | Pediatrics Physician | Tulsa, OK | 2005 |
| Stefanie O'Sullivan, RN | 1457812059 | Family Nurse Practitioner | Waupaca, WI | 2019 |
| Stephanie O'Sullivan, BA.PY,AT | 1063845188 | Mental Health Counselor | Guilford, CT | 2013 |
| Stephen O'Sullivan, MS, QMHP | 1689714958 | Mental Health Counselor | Portland, OR | 2007 |
| Susan O'Sullivan, BCBA | 1568016293 | Behavior Analyst | Little Ferry, NJ | 2019 |
| Susanna O'Sullivan, RN, MSN, ANP-BC | 1447482187 | Adult Health Nurse Practitioner | Rancho Mirage, CA | 2009 |
| Tanya O'Sullivan, PTA | 1326745670 | Physical Therapy Assistant | Sarasota, FL | 2023 |
| Teresa O'Sullivan, PHARM.D. | 1003260035 | Pharmacotherapy Pharmacist | Seattle, WA | 2016 |
| Teresa O'Sullivan, PT | 1164916078 | Physical Therapist | Springfield, IL | 2018 |
| Teri O'Sullivan, NP-C | 1679183925 | Family Nurse Practitioner | Richmond, VA | 2020 |
| Theresa O'Sullivan | 1376197269 | Physical Therapist | Wilmington, NC | 2019 |
| Thomas O'Sullivan, DPT, ATC | 1649944059 | Physical Therapist | Chandler, AZ | 2021 |
| Thomas O'Sullivan, DDS | 1861591372 | General Practice Dentistry | Leawood, KS | 2006 |
| Timothy O'Sullivan, MA | 1871986026 | Counselor | Fort Wayne, IN | 2015 |
| Timothy O'Sullivan | 1912430687 | Sports Medicine (Physical Medicine & Rehabilitation) Physician | Wayne, NJ | 2017 |
| Tina O'Sullivan, LSW | 1770295453 | Mental Health Counselor | Highland Park, NJ | 2022 |
| Tonya O'Sullivan, LMT | 1689878399 | Homeopath | Sebring, FL | 2007 |
| Tyler O'Sullivan, BS ACT | 1376161026 | Addiction (Substance Use Disorder) Counselor | Rapid City, SD | 2020 |
| Vita O'Sullivan | 1194524520 | Specialist | Melville, NY | 2025 |
| Whitney O'Sullivan, NP-C | 1306482617 | Family Nurse Practitioner | Munster, IN | 2019 |
| William O'Sullivan | 1801408877 | Professional Counselor | Fernandina Beach, FL | 2020 |
| Zoey O'Sullivan, LCSW | 1043416142 | Social Worker | Brookline, MA | 2007 |
| Geraldine O'Sullivan Coyne, M.D, PHD | 1205182318 | Medical Oncology Physician | Bethesda, MD | 2012 |
| Karen O'Sullivan Seifert, MA CCC SLP | 1679629497 | Speech-Language Pathologist | Patchogue, NY | 2007 |
| Elizabeth O'Sullivan Smith | 1699171512 | Addiction (Substance Use Disorder) Counselor | North Babylon, NY | 2014 |
| Tara O'Sullivan-Jordan, RN | 1477986180 | Registered Nurse | Williamsville, NY | 2013 |
| Charlene O'Sullivan-Kloppenburg | 1609652924 | Behavior Technician | Monrovia, CA | 2023 |
| Emerald O'Sullivan-Mejia, MD | 1548461932 | Anatomic Pathology & Clinical Pathology Physician | Fredericksburg, VA | 2007 |
| Bryan O'Sullivan-Murphy, M.D., PH.D. | 1891115820 | Diagnostic Radiology Physician | Durham, NC | 2014 |
| Sorcha O'Sullivan-Murphy, NP | 1245565829 | Nurse Practitioner | Worcester, MA | 2009 |
| Patricia O'Sullivan-O'Connor, ADULT NURSE PRACTITI | 1457660839 | Nurse Practitioner | New York, NY | 2010 |
| Orla O'Sullivan-Roche | 1518540376 | Medical Physician Assistant | New York, NY | 2021 |
| Bitty O'Sullivan-Smith | 1053674952 | Specialist | Ridgefield, CT | 2012 |
| Chibuzo O'Suoji, M.D. | 1952523458 | Pediatric Hematology & Oncology Physician | Lubbock, TX | 2007 |
| Gwendolyn O'Tang, PT | 1225231913 | Physical Therapist | Laurel, MD | 2007 |
| Laura O'Tell, M.A. | 1538295365 | Mental Health Counselor | Worcester, MA | 2007 |
| Shelby O'Teter | 1023592128 | Other Technician | Irving, TX | 2018 |
| Kevin O'Tey, LMT | 1497632129 | Massage Therapist | Dover, DE | 2025 |
| Charlotte O'Tiarnaigh, PH.D | 1639372964 | Clinical Psychologist | Asbury Park, NJ | 2007 |
| Blaine O'Tolls, LCPC | 1043188659 | Professional Counselor | East Helena, MT | 2025 |
| Brian O'Tool | 1033233218 | Physical Therapist | Ames, IA | 2007 |
| Erin O'Tool, MD | 1104050954 | Family Medicine Physician | Oak Creek, WI | 2009 |
| Erin O'Tool, PT , DPT | 1851141261 | Physical Therapist | Eldersburg, MD | 2024 |
| Jeffrey O'Tool, M.D. | 1295796654 | Emergency Medicine Physician | Sioux City, IA | 2006 |
| Joseph O'Tool, D.C. | 1215278106 | Chiropractor | Grimes, IA | 2013 |
| Samuel O'Tool, D.C. | 1710364047 | Chiropractor | Ankeny, IA | 2015 |
| Sara O'Tool, R.D., L.D. | 1699132449 | Registered Dietitian | Mason City, IA | 2016 |
| Taniquell O'Tool, LCPC | 1871036046 | Counselor | Bozeman, MT | 2016 |
| Tate O'Tool | 1225516735 | Student in an Organized Health Care Education/Training Program | Fort Dodge, IA | 2018 |
| Abby O'Toole | 1033795018 | Behavior Technician | Dover, DE | 2021 |
| Adam O'Toole, M.D. | 1467795575 | Plastic Surgery Physician | Pasadena, CA | 2013 |
| Adelaide O'Toole | 1831978626 | Pediatric Nurse Practitioner | Kansas City, MO | 2023 |
| Aimee O'Toole, APRN | 1831781046 | Nurse Practitioner | The Villages, FL | 2021 |
| Ainslie O'Toole | 1528594843 | Mental Health Counselor | Arlington, TX | 2017 |
| Alanna O'Toole, BCBA | 1346899614 | Behavior Analyst | Staten Island, NY | 2019 |
| Alexis O'Toole, RN | 1386455855 | Registered Nurse | New York, NY | 2025 |
| Alicia O'Toole, DPT | 1144804436 | Physical Therapist | Sudbury, MA | 2021 |
| Alicia O'Toole, MPT | 1316052608 | Physical Therapist | Barboursville, WV | 2006 |
| Aliina O'Toole, PA-C | 1740831486 | Physician Assistant | Oklahoma City, OK | 2019 |
| Angela O'Toole, DPT | 1659331023 | Physical Therapist | Port Huron, MI | 2006 |
| Angelina O'Toole | 1336864974 | Gerontology Nurse Practitioner | Manahawkin, NJ | 2022 |
| Anita O'Toole, CRNA | 1417148511 | Certified Registered Nurse Anesthetist | Monroe, LA | 2007 |
| Aoibhlinn O'Toole, MB BCH BAO | 1366881823 | Student in an Organized Health Care Education/Training Program | Boston, MA | 2013 |
| Ashley O'Toole, OTR/L | 1851084537 | Occupational Therapist | San Dimas, CA | 2023 |
| Bailey O'Toole | 1003397845 | Marriage & Family Therapist | Cedar Rapids, IA | 2018 |
| Barbara O'Toole, RPH | 1003410127 | Pharmacist | Prairie Village, KS | 2020 |
| Brandon O'Toole | 1992393664 | Registered Dietitian | Klamath Falls, OR | 2021 |
| Brendan O'Toole, RN | 1538720859 | Adult Psychiatric/Mental Health Registered Nurse | Seattle, WA | 2019 |
| Brittaney O'Toole | 1467969683 | Certified Registered Nurse Anesthetist | Dallas, TX | 2018 |
| Brittany O'Toole | 1386909984 | Occupational Therapist | Morgantown, WV | 2012 |
| Brittany O'Toole, FNP-BC | 1548928815 | Family Nurse Practitioner | Summerville, GA | 2021 |
| Brittny O'Toole | 1073279964 | Health & Wellness Coach | Roanoke, VA | 2021 |
| Cailey O'Toole | 1912735143 | Behavior Technician | Beverly, MA | 2024 |
| Cara O'Toole, PHARM.D | 1295499580 | Pharmacist | Franklin, MA | 2021 |
| Carrie O'Toole, LMSW | 1942388756 | Social Worker | Saginaw, MI | 2006 |
| Catalina O'Toole, DO | 1841846698 | Student in an Organized Health Care Education/Training Program | Mesa, AZ | 2019 |
| Catherine O'Toole | 1164853875 | Specialist | East Setauket, NY | 2013 |
| Celler O'Toole, P.T. | 1407868227 | Physical Therapist | Columbus, OH | 2006 |
| Charlotte O'Toole | 1366623498 | Pediatric Physical Therapist | Lowell, MA | 2007 |
| Chelsea O'Toole, FNP-BC | 1841924958 | Family Nurse Practitioner | Nashville, TN | 2022 |
| Cheryl O'Toole, PSY.D. | 1699984708 | Psychologist | Chicago, IL | 2007 |
| Chloe O'Toole | 1376173799 | Speech-Language Pathologist | Grand Rapids, MI | 2020 |
| Christine O'Toole, LCSW | 1003465600 | Clinical Social Worker | Sierra Vista, AZ | 2019 |
| Christine O'Toole, LCSW | 1053463000 | Clinical Social Worker | New York, NY | 2007 |
| Christine O'Toole, CPHT | 1811141856 | Pharmacy Technician | Woburn, MA | 2008 |
| Christopher O'Toole, ATC, LAT | 1134321300 | Athletic Trainer | Auburn, ME | 2007 |
| Christopher O'Toole | 1619209087 | Addiction (Substance Use Disorder) Counselor | Fullerton, CA | 2010 |
| Clare O'Toole | 1508006511 | Marriage & Family Therapist | Oakland, CA | 2009 |
| Coleen O'Toole, MFT | 1952493959 | Marriage & Family Therapist | Huntington Beach, CA | 2006 |
| Corrie O'Toole, MSW | 1609071026 | Clinical Social Worker | Garden Grove, CA | 2007 |
| Cristie O'Toole, MS, CCC-SLP | 1902050149 | Speech-Language Pathologist | Mesa, AZ | 2008 |
| Cyndi O'Toole, BCBA-D | 1609394873 | Behavior Analyst | Wimberley, TX | 2017 |
| Dale O'Toole, OTR, CHT | 1487714135 | Occupational Therapist | Austin, TX | 2006 |
| Dale O'Toole, MA,CCC,SLP/L | 1649420894 | Speech-Language Pathologist | Amherst, NY | 2008 |
| Dana O'Toole, M.D. | 1881058600 | Pediatrics Physician | New York, NY | 2016 |
| Daniel O'Toole | 1013005776 | General Practice Dentistry | Ann Arbor, MI | 2006 |
| Daniel O'Toole, MD | 1184247652 | Plastic and Reconstructive Surgery Physician | Liberty, MO | 2020 |
| Daniel O'Toole, OTRL | 1326608167 | Occupational Therapist | Ann Arbor, MI | 2019 |
| Danielle O'Toole, CRNA | 1497127211 | Certified Registered Nurse Anesthetist | Kingston, NY | 2015 |
| David O'Toole, M.D. | 1659329811 | Pain Medicine Physician | Kernersville, NC | 2006 |
| Dawn O'Toole, NP | 1568654598 | Family Nurse Practitioner | Waltham, MA | 2007 |
| Deena O'Toole, M.D. | 1770528861 | Family Medicine Physician | Gainesville, FL | 2006 |
| Devin O'Toole, MD | 1700679685 | Surgery Physician | Austin, TX | 2025 |
| Diana O'Toole, LMHC | 1083218218 | Professional Counselor | Framingham, MA | 2020 |
| Dolores O'Toole, RPH | 1225049323 | Pharmacist | Waco, TX | 2006 |
| Donna O'Toole, FNP-C | 1295867034 | Family Nurse Practitioner | Paris, TX | 2007 |
| Doreen O'Toole, R.N. | 1831307958 | Orthopedic Registered Nurse | Farmingdale, NY | 2007 |
| Duangporn O'Toole, PSYD | 1790402808 | Clinical Psychologist | Chalfont, PA | 2022 |
| Edward O'Toole, COTA/L | 1588201776 | Occupational Therapy Assistant | Grayslake, IL | 2019 |
| Edward O'Toole, PTA | 1801052048 | Physical Therapy Assistant | Lynn, MA | 2008 |
| Eileen O'Toole, L.M.T. | 1033496336 | Contractor | East Stroudsburg, PA | 2011 |
| Eileen O'Toole, CRNP | 1053312546 | Family Nurse Practitioner | Pittsburgh, PA | 2005 |
| Elizabeth O'Toole, MD | 1649281023 | Hospice and Palliative Medicine (Internal Medicine) Physician | Cleveland, OH | 2006 |
| Ellen O'Toole, PT | 1659387215 | Physical Therapist | Monroeville, PA | 2006 |
| Ellen O'Toole, M.ED, LPC | 1902025323 | Mental Health Counselor | Sandy, OR | 2007 |
| Ellen O'Toole, PH.D. | 1962652883 | Clinical Psychologist | Santa Rosa, CA | 2008 |
| Emily O'Toole, PT | 1053545640 | Physical Therapist | Syracuse, NY | 2009 |
| Emily O'Toole | 1932592078 | Student in an Organized Health Care Education/Training Program | Palos Park, IL | 2015 |
| Emma O'Toole | 1306707807 | Psychiatric/Mental Health Nurse Practitioner | Dedham, MA | 2025 |
| Erin O'Toole | 1114858990 | Speech-Language Pathologist | Avon, OH | 2026 |
| Erin O'Toole, M.S., L.C.G.C. | 1306386933 | Genetic Counselor (M.S.) | Columbus, OH | 2017 |
| Erin O'Toole, MS | 1497224877 | Mental Health Counselor | Rochester, NY | 2018 |
| Erin O'Toole, PHARMD | 1578875977 | Pharmacist | Cuyahoga Falls, OH | 2010 |
| Erin O'Toole, LCPC | 1649741943 | Professional Counselor | Frederick, MD | 2018 |
| Erin O'Toole, PA-C | 1679547368 | Physician Assistant | North Grafton, MA | 2006 |
| Fallon O'Toole | 1053144717 | Student in an Organized Health Care Education/Training Program | Syracuse, NY | 2024 |
| Francis O'Toole, DO | 1124969571 | Student in an Organized Health Care Education/Training Program | Lexington, KY | 2026 |
| Gina O'Toole, RD, MPH | 1306788161 | Pediatric Critical Care Nutrition Registered Dietitian | Orange, CA | 2026 |
| Grace O'Toole | 1548058464 | Pharmacist | State College, PA | 2025 |
| Gregory O'Toole, DDS | 1639121494 | Endodontics | Wayzata, MN | 2006 |
| Hayley O'Toole | 1225767569 | Mental Health Counselor | Bedford, NH | 2022 |
| Heather O'Toole, M.D. | 1992797880 | Family Medicine Physician | Phoenix, AZ | 2005 |
| Holly O'Toole, RN-BC | 1538799408 | Adult Psychiatric/Mental Health Registered Nurse | Tallahassee, FL | 2020 |
| Jacqueline O'Toole, D.O. | 1902148471 | Pulmonary Disease Physician | Baltimore, MD | 2013 |
| James O'Toole, RDN | 1003320102 | Registered Dietitian | Peabody, MA | 2017 |
| James O'Toole, MD | 1043214463 | Cardiovascular Disease Physician | Pittsburgh, PA | 2005 |
| James O'Toole, D.C. | 1245264746 | Chiropractor | Mission Viejo, CA | 2006 |
| James O'Toole, MD | 1396701439 | Anesthesiology Physician | Memphis, TN | 2006 |
| James O'Toole, M.D. | 1790936631 | Plastic Surgery Physician | Pittsburgh, PA | 2008 |
| James O'Toole | 1811756489 | Student in an Organized Health Care Education/Training Program | Miami, FL | 2024 |
| James O'Toole, D.C. | 1952746794 | Chiropractor | Highland Park, IL | 2013 |
| Jamie O'Toole, PA-C | 1730496373 | Medical Physician Assistant | Staten Island, NY | 2010 |
| Jean O'Toole, P.T. | 1548399520 | Physical Therapist | Boston, MA | 2007 |
| Jeanine O'Toole, RD | 1609748243 | Registered Dietitian | Lincroft, NJ | 2025 |
| Jennifer O'Toole, M.D. | 1184844193 | Hospitalist Physician | Cincinnati, OH | 2007 |
| Jennifer O'Toole, SUDPT | 1346976073 | Addiction (Substance Use Disorder) Counselor | Kennewick, WA | 2022 |
| Jennifer O'Toole, PTA | 1356083091 | Physical Therapy Assistant | Rocklin, CA | 2022 |
| Jennifer O'Toole, APN CRNA | 1538182332 | Certified Registered Nurse Anesthetist | Chicago, IL | 2006 |
| Jennifer O'Toole | 1891099685 | Clinical Social Worker | Des Moines, IA | 2011 |
| Jessica O'Toole | 1164309365 | Specialist | Brooklyn, NY | 2025 |
| Jill O'Toole, LSW | 1578802963 | Social Worker | Pottsville, PA | 2013 |
| Jillian O'Toole, MS, CGC | 1962361527 | Genetic Counselor (M.S.) | Brookline, MA | 2026 |
| Jodie O'Toole, SLP | 1750331898 | Speech-Language Pathologist | Seattle, WA | 2006 |
| John O'Toole, M.D. | 1619926672 | Neurological Surgery Physician | Chicago, IL | 2006 |
| John O'Toole, MD | 1700968617 | Nephrology Physician | Cleveland, OH | 2006 |
| John O'Toole, M.D. | 1922048057 | Emergency Medicine Physician | Ashtabula, OH | 2006 |
| Joseph O'Toole, MSW | 1508061920 | Clinical Social Worker | Garden Grove, CA | 2007 |
| Joseph O'Toole, MD | 1821093931 | Cardiovascular Disease Physician | Pittsburgh, PA | 2005 |
| Josie O'Toole, NP | 1346704046 | Pediatric Nurse Practitioner | Fort Myers, FL | 2019 |
| Julianna O'Toole, DO | 1992384135 | Student in an Organized Health Care Education/Training Program | Pittsburgh, PA | 2021 |
| Julianne O'Toole, LMSW | 1316278435 | Social Worker | Troy, NY | 2010 |
| Julie O'Toole, M.D. | 1780760785 | Pediatric Adolescent Medicine Physician | Portland, OR | 2006 |
| Kandace O'Toole, CRNA | 1316291545 | Certified Registered Nurse Anesthetist | Dallas, TX | 2012 |
| Kara O'Toole, MA, LPC | 1285208165 | Professional Counselor | Sharonville, OH | 2021 |
| Karan O'Toole, R.N. | 1174867550 | Registered Nurse | Liverpool, NY | 2012 |
| Kari O'Toole, APRN-CNP | 1194500355 | Nurse Practitioner | Oklahoma City, OK | 2023 |
| Katherine O'Toole, NP-C | 1457822868 | Nurse Practitioner | Goshen, IN | 2018 |
| Kathleen O'Toole, LCSW | 1033721808 | Clinical Social Worker | Portland, ME | 2020 |
| Kathleen O'Toole, R.N. | 1194087577 | Continuing Education/Staff Development Registered Nurse | West Roxbury, MA | 2012 |
| Kathleen O'Toole, M.D. | 1922135227 | Anatomic Pathology Physician | New York, NY | 2007 |
Source: CMS National Plan and Provider Enumeration System (NPPES) (download.cms.gov). A listing is not a recommendation: check a license with the state board (license lookups).